China En 10297 Mechanical Pipes/Tubes, Find details about China En 10297 Mechanical Tubes, Mechanical Tubes from En 10297 Mechanical Pipes/Tubes
Steel grade | C | Si | Mn | P | S | Cr | Mo | Ni | Other elem ents | |||||||
Steel name | Steelnum ber | min | max | min | max | min | max | max | max | min | max | min | max | min | max | |
E235 | 1.0308 | 0.17 | - | 0.35 | - | 1.20 | 0.030 | 0.035 | ||||||||
E275 | 1.0225 | 0.21 | - | 0.35 | - | 1.40 | 0.030 | 0.035 | ||||||||
E315 | 1.0236 | 0.21 | - | 0.30 | - | 1.50 | 0.030 | 0.035 | ||||||||
E355 b | 1.0580 | 0. 22 | - | 0.55 | - | 1.60 | 0.030 | 0.035 | ||||||||
E470 | 1.0536 | 0.16 | 0.22 | 0.10 | 0.50 | 1.30 | 1.70 | 0.030 | 0.035 | Al min 0.010, N max. 0.020, Nb Max.0.07,V 0.08/0.15 | ||||||
C22E | 1.1 151 | 0. 17 | 0. 24 | - | 0. 40 | 0. 40 | 0. 70 | 0.0 35 | 0.0 35 | |||||||
C35E | 1.1 181 | 0. 32 | 0. 39 | - | 0. 40 | 0. 50 | 0. 80 | 0.0 35 | 0.0 35 | |||||||
C45E | 1.1 191 |
Term | Symbol | Explanation |
Cold-finished/hard (cold-finished as-drawn) | BK | No heat treatment after the last cold-forming process. The tubes therefore have only low deformability. |
Cold-finished/soft (lightly cold-worked) | BKW | After the last heat treatment there is a light finishing pass (cold drawing) With proper subsequent processing, the tube can be cold-formed (e.g. bent, expanded) within certain limits. |
Annealed | GBK | After the final cold-forming process the tubes are annealed in a controlled atmosphere or under vacuum. |
Normalized | NBK | The tubes are annealed above the upper transformation point in a controlled atmosphere or under vacuum. |